technical memorandum january 2011 levee well sampling ......for november 2010 through february 2011....

I:\16530759 COP Parent Number\16530661 Former Phillips KC - completion\01000 Revised CI\Revised CI Package\Appendix E\Levee well tech memo.doc

Technical Memorandum

January 2011 Levee Well Sampling Event

Former Phillips Refinery and Kansas City Terminal Kansas City, Kansas

The following Technical Memorandum (Tech Memo) summarizes the 2011 levee well groundwater

monitoring event completed between January 31, 2011 and February 9, 2011. Prior to sample

collection, 11 monitoring wells onsite and 8 monitoring wells along the Missouri River levee were

gauged for depth to light non-aqueous phase liquid (LNAPL) and/or groundwater. Eighteen out of

the twenty groundwater monitoring wells scheduled for sampling per the Draft Final Letter Work

Plan – Levee Well Sampling Plan dated June 7, 2010 (Attachment 1) were sampled. MW-75 was not

sampled due to insufficient water in the well. MW-113S was not sampled or gauged due to the

casing being compromised during grading operations (performed by others) on the farmland adjacent

to the levee. MW-113S will be properly abandoned and reinstalled in order to maintain the

monitoring well network.

In accordance with the approved work plan, laboratory analysis included:

• Site specific volatile organic compounds (VOCs) via Method 8260;

• Gasoline Range Organics (GRO) via Method 8015; and,

• Diesel Range Organics (DRO) via Method 8015.

Figure 1 to Attachment 1 shows the site and monitoring well network. Table 1 presents the pre-

sampling gauging results. Detections are listed on Table 2 sorted by “Chemical” and on Table 3

sorted by “Location.” Data were validated per Level 2 guidelines and the May 2010 Draft Final

Quality Assurance Project Plan (QAPP). Listed screening levels are those used in ConocoPhillips’

Final Human Health Risk Assessment currently being reviewed by KDHE and EPA.

For the sampled levee wells east of the levee (MWs-305, 306, 307, 308, 309, 314, 310, and 311) the

following detections were reported as listed below in Table A. EPA Regional Screening Levels

(RSL) from Tap Water Supporting Table November 2010, maximum contaminant levels (MCL), and

Kansas Tier 2, Residential, Risk-based Standards (RSK) are also listed in Table A.

Table A: Levee Well Detections

Site Location Chemical Result Units

Qualifiers EPA RSL MCL/RSK

COP Levee MW-305 Carbon Disulfide 0.24 ug/L 4.4E-01 5.0E0/1.66E3

COP Levee MW-306 Chloroethane 1.3 ug/L None None/2.64E4

COP Levee MW-310 Chloroform 0.12 ug/L 1.9E-01 8.0E1/8.0E1

COP Levee MW-307 Methyl tert-butyl ether (MTBE) 1.5 ug/L 1.2E+01 None/2.62E2

COP Levee MW-308 Methyl tert-butyl ether (MTBE) 0.12 ug/L 1.2E+01 None/2.62E2

No detections in any of the monitoring wells east of the levee exceeded screening criteria. These

results are consistent with data obtained during the semi-annual sampling events for the Site.

Technical Memorandum

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Detections in the site side monitoring wells that exceeded screening criteria are noted in bold in

Tables 2 and 3. The complete analytical reports for the levee well sampling event are attached in

Attachment 2.

Because of low Missouri

River elevations as shown on

Exhibit 1, there was, most

likely, a period of sustained

groundwater flow toward the

river prior to the sampling

event.

Based on January 2011

gauging results (Table 1 and

Figure 1) actual flow appears

to be in the east/southeast

direction toward the river.

Despite the low groundwater

levels, no LNAPL layers were

detected in any of the levee

side or site side monitoring

wells that were sampled.

Measurable LNAPL product

has never been reported in levee side monitoring wells. COP continues to recover LNAPL on the

terminal property using two, solar powered pneumatic pumps, passive skimmers, and absorbent

socks. A more detailed LNAPL recovery report is included in the 2010 Annual Report. Field data

sheets including water quality data are provided in Attachment 3.

The levee property located between the terminal site and the river consists of rail line, levee and

floodplain immediately adjacent to the river. There are no buildings or groundwater supply wells on

this stretch of land, nor would any be expected in the future. As such, there is no exposure or risks

from groundwater in this area. Additionally, given the volume of water in the river, and its dilution

effects, it is unlikely that surface water in the river would be adversely impacted by groundwater

releases. Groundwater sampling will continue at the Site per the Kansas Department of Health and

Environment (KDHE) approved Final Semi-annual Groundwater Monitoring Plan (GWMP) dated

March 2010. The next semi-annual groundwater sampling event is scheduled for April 2010.

Attachments:

Table 1: Gauging Results

Table 2: Detections by Chemical

Table 3: Detections by Location

Figure 1: Levee Well Sampling Network

Attachment 1: Levee Well Sampling Plan

Attachment 2: Pace Analytical Laboratory Reports

Attachment 3: Field Data Sheets

Exhibit 1: MO River Elevations feet above mean sea level (MSL)

for November 2010 through February 2011.

Tables

Table 1 - Gauging Results

Former Phillips Refinery and Kansas City Terminal

MW-105S Apr-09 NONE 25.77 747.65 721.88 NONE

MW-105S Oct-09 NONE 24.83 747.65 722.82 NONE

MW-105S Apr-10 18.99 19.00 747.65 728.66 0.01

MW-105S Jan-11 NONE 25.54 747.65 722.11 NONE

MW-106S Apr-09 NONE 29.51 751.24 721.73 NONE

MW-106S Oct-09 NONE 28.85 751.24 722.39 NONE

MW-106S Apr-10 NONE 22.34 751.24 728.90 NONE

MW-106S Jan-11 NONE 29.65 751.24 721.59 NONE

MW-107S Apr-09 NONE 26.92 748.27 721.35 NONE

MW-107S Oct-09 NONE 26.98 748.27 721.29 NONE

MW-107S Apr-10 NONE 18.90 748.27 729.37 NONE

MW-107S Jan-11 NONE 28.08 748.27 720.19 NONE

MW-111S Apr-09 NONE 27.51 749.28 721.77 NONE

MW-111S Oct-09 NONE 27.58 749.28 721.70 NONE

MW-111S Apr-10 NONE 19.80 749.28 729.48 NONE

MW-111S Jan-11 NONE 28.60 749.28 720.68 NONE

MW-112S Apr-09 NONE 25.57 747.66 722.09 NONE

MW-112S Oct-09 NONE 25.40 747.66 722.26 NONE

MW-112S Apr-10 NONE 18.45 747.66 729.21 NONE

MW-112S Jan-11 NONE 26.05 747.66 721.61 NONE

MW-113S Apr-09 NONE 22.09 744.24 722.15 NONE

MW-113S Oct-09 NONE 22.41 744.24 721.83 NONE

MW-113S Apr-10 NONE 14.90 744.24 729.34 NONE

MW-113S Jan-11 NONE NA 744.24 NA NONE

MW-301S Apr-09 NONE 26.61 748.59 721.98 NONE

MW-301S Oct-09 NONE 25.83 748.59 722.76 NONE

MW-301S Apr-10 NONE 19.76 748.59 728.83 NONE

MW-301S Jan-11 NONE 26.68 748.59 721.91 NONE

MW-302S Apr-09 NONE 25.73 747.54 721.81 NONE

MW-302S Oct-09 NONE 24.93 747.54 722.61 NONE

MW-302S Apr-10 NONE 18.82 747.54 728.72 NONE

MW-302S Jan-11 NONE 25.66 747.54 721.88 NONE

MW-303S Apr-09 NONE 26.96 748.65 721.69 NONE

MW-303S Oct-09 NONE 26.94 748.65 721.71 NONE

MW-303S Apr-10 NONE 19.43 748.65 729.22 NONE

MW-303S Jan-11 NONE 27.91 748.65 720.74 NONE

MW-304S Apr-09 NONE 28.07 749.62 721.55 NONE

MW-304S Oct-09 NONE 28.16 749.62 721.46 NONE

MW-304S Apr-10 NONE 20.30 749.62 729.32 NONE

MW-304S Jan-11 NONE 29.20 749.62 720.42 NONE

MW-305 Apr-09 NONE 22.03 744.34 722.31 NONE

MW-305 Oct-09 NONE 22.12 744.34 722.22 NONE

MW-305 Apr-10 NONE 14.81 744.34 729.53 NONE

LNAPL Thickness

(feet)Well ID Date

Depth to LNAPL

(TOC)Depth to Water

(feet MSL)

GW Elev.

(feet MSL)

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Table 1 - Gauging Results

Former Phillips Refinery and Kansas City Terminal

LNAPL Thickness

(feet)Well ID Date

Depth to LNAPL

(TOC)Depth to Water

(feet MSL)

GW Elev.

(feet MSL)

MW-305 Jan-11 NONE 23.09 744.34 721.25 NONE

MW-306 Apr-09 NONE 21.33 743.53 722.20 NONE

MW-306 Oct-09 NONE 21.37 743.53 722.16 NONE

MW-306 Apr-10 NONE 14.15 743.53 729.38 NONE

MW-306 Jan-11 NONE 22.19 743.53 721.34 NONE

MW-307 Apr-09 NONE 21.37 743.45 722.08 NONE

MW-307 Oct-09 NONE 21.57 743.45 721.88 NONE

MW-307 Apr-10 NONE 14.13 743.45 729.32 NONE

MW-307 Jan-11 NONE 22.43 743.45 721.02 NONE

MW-308 Apr-09 NONE 23.00 744.93 721.93 NONE

MW-308 Oct-09 NONE 23.27 744.93 721.66 NONE

MW-308 Apr-10 NONE 15.59 744.93 729.34 NONE

MW-308 Jan-11 NONE 24.25 744.93 720.68 NONE

MW-309 Apr-09 NONE 20.52 742.50 721.98 NONE

MW-309 Oct-09 NONE 21.43 742.50 721.07 NONE

MW-309 Apr-10 NONE 12.89 742.50 729.61 NONE

MW-309 Jan-11 NONE 22.40 742.50 720.10 NONE

MW-310 Apr-09 NONE 20.65 742.57 721.92 NONE

MW-310 Oct-09 NONE 21.78 742.57 720.79 NONE

MW-310 Apr-10 NONE 13.11 742.57 729.46 NONE

MW-310 Jan-11 NONE 22.80 742.57 719.77 NONE

MW-311 Apr-09 NONE 20.71 742.49 721.78 NONE

MW-311 Oct-09 NONE 21.89 742.49 720.60 NONE

MW-311 Apr-10 NONE 13.05 742.49 729.44 NONE

MW-311 Jan-11 NONE 22.94 742.49 719.55 NONE

MW-313 Apr-09 NONE 26.72 746.62 719.90 NONE

MW-313 Oct-09 NONE 26.81 746.62 719.81 NONE

MW-313 Apr-10 NONE 19.09 746.62 727.53 NONE

MW-313 Jan-11 NONE 27.79 746.62 718.83 NONE

MW-314 Apr-09 NONE 20.50 740.63 720.13 NONE

MW-314 Oct-09 NONE 21.47 740.63 719.16 NONE

MW-314 Apr-10 NONE 12.77 740.63 727.86 NONE

MW-314 Jan-11 NONE 22.48 740.63 718.15 NONE

MW-75 Apr-09 NONE 28.13 749.53 721.40 NONE

MW-75 Oct-09 NONE 27.69 749.53 721.84 NONE

MW-75 Apr-10 NONE 20.56 749.53 728.97 NONE

MW-75 Jan-11 NONE 28.66 749.53 720.87 NONE

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Table 2 - Detections by Chemical

January 2011 Levee Well Event

Former Phillips Refinery and Kansas City, Terminal

Site Location Chemical Result2

Qualifiers

Screening

Value1

COP Levee MW-105S 1,1,2,2-Tetrachloroethane 10.3 ug/L J 0.067

COP Levee MW-304S 1,1,2,2-Tetrachloroethane 1.2 ug/L 0.067

COP Levee MW-105S 1,1-Dichloroethene 5.1 ug/L J 34

COP Levee MW-105S 1,2,3-Trichlorobenzene 42.3 ug/L J 0.82

COP Levee MW-105S 1,2,4-Trimethylbenzene 37.7 ug/L J 1.5

COP Levee MW-106S 1,2,4-Trimethylbenzene 20.8 ug/L 1.5

COP Levee MW-313 1,2,4-Trimethylbenzene 0.6 ug/L 1.5

COP Levee MW-105S 1,2-Dibromo-3-chloropropane 21.5 ug/L J 0.00032

COP Levee MW-105S 1,3-Dichlorobenzene 8.8 ug/L J 0.43

COP Levee MW-105S 4-Chlorotoluene 6.5 ug/L J 260

COP Levee MW-105S 4-Isopropyltoluene (p-Cymene) 12.5 ug/L J 68

COP Levee MW-106S 4-Isopropyltoluene (p-Cymene) 5.5 ug/L 68

COP Levee MW-313 4-Isopropyltoluene (p-Cymene) 0.25 ug/L 68

COP Levee MW-105S 4-Methyl-2-pentanone (MIBK) 43.3 ug/L J 200

COP Levee MW-303S 4-Methyl-2-pentanone (MIBK) 1.1 ug/L 200

COP Levee MW-105S Benzene 5730 ug/L 0.41

COP Levee MW-107S Benzene 0.64 ug/L 0.41

COP Levee MW-302S Benzene 1.8 ug/L J 0.41

COP Levee MW-313 Benzene 181 ug/L 0.41

COP Levee MW-105S Bromobenzene 5.8 ug/L J 2

COP Levee MW-105S Bromochloromethane 5.9 ug/L J 4.8

COP Levee MW-105S Bromomethane 15.7 ug/L J 0.87

COP Levee MW-105S Carbon Disulfide 10.5 ug/L J 30

COP Levee MW-106S Carbon Disulfide 0.43 ug/L 30

COP Levee MW-305 Carbon Disulfide 0.24 ug/L 30

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Qualifiers

Screening

Value1

COP Levee MW-306 Chloroethane 1.3 ug/L 89

COP Levee MW-105S Chloroform 21.3 ug/L J 0.19

COP Levee MW-304S Chloroform 2.3 ug/L 0.19

COP Levee MW-310 Chloroform 0.12 ug/L 0.19

COP Levee MW-112S cis-1,2-Dichloroethene 0.12 ug/L J 37

COP Levee MW-105S Ethylbenzene 286 ug/L 1.5

COP Levee MW-106S Ethylbenzene 31.3 ug/L 1.5

COP Levee MW-303S Ethylbenzene 1.3 ug/L J 1.5

COP Levee MW-313 Ethylbenzene 0.74 ug/L 1.5

COP Levee MW-105S Hexachloro-1,3-butadiene 35.7 ug/L J 0.86

COP Levee MW-105S Isopropylbenzene 266 ug/L 68

COP Levee MW-106S Isopropylbenzene 25.7 ug/L 68

COP Levee MW-313 Isopropylbenzene 8.8 ug/L 68

COP Levee MW-105S Methyl tert-butyl ether (MTBE) 7.3 ug/L J 12

COP Levee MW-106S Methyl tert-butyl ether (MTBE) 1 ug/L 12

COP Levee MW-307 Methyl tert-butyl ether (MTBE) 1.5 ug/L 12

COP Levee MW-105S Methylene chloride 68.8 ug/L 4.8

COP Levee MW-105S m-Xylene & p-Xylene 222 ug/L 140

COP Levee MW-106S m-Xylene & p-Xylene 46.3 ug/L 140

COP Levee MW-313 m-Xylene & p-Xylene 12.2 ug/L 140

COP Levee MW-105S Naphthalene 53.5 ug/L J 0.14

COP Levee MW-106S Naphthalene 4.6 ug/L 0.14

Qualifiers

Screening

Value1

COP Levee MW-105S n-Butylbenzene 22.9 ug/L J 1.5

COP Levee MW-106S n-Butylbenzene 4.2 ug/L 1.5

COP Levee MW-313 n-Butylbenzene 0.16 ug/L 1.5

COP Levee MW-105S n-Propylbenzene 79.8 ug/L 1.5

COP Levee MW-313 n-Propylbenzene 6.1 ug/L 1.5

COP Levee MW-105S o-Xylene 15.9 ug/L J 140

COP Levee MW-106S o-Xylene 7.1 ug/L 140

COP Levee MW-313 o-Xylene 3.4 ug/L 140

COP Levee MW-106S sec-Butylbenzene 4.3 ug/L 1.5

COP Levee MW-105S tert-Butylbenzene 10 ug/L J 1.5

COP Levee MW-106S tert-Butylbenzene 1.6 ug/L 1.5

COP Levee MW-313 tert-Butylbenzene 0.44 ug/L 1.5

COP Levee MW-105S Toluene 221 ug/L 230

COP Levee MW-107S Toluene 0.32 ug/L 230

COP Levee MW-313 Toluene 3.8 ug/L 230

COP Levee MW-105S Total Petroleum Hydrocarbons 2700 ug/L J 720

COP Levee MW-313 Total Petroleum Hydrocarbons 250 ug/L J 720

COP Levee MW-105S TPH-GRO 28400 ug/L 500

Qualifiers

Screening

Value1

COP Levee MW-302S TPH-GRO 5400 ug/L J 500

COP Levee MW-313 TPH-GRO 1900 ug/L 500

COP Levee MW-105S Trichloroethene 6.6 ug/L J 1.7

COP Levee MW-106S Trichloroethene 0.22 ug/L 1.7

2Results in Bold exceed the screening criteria

1Screening Levels are those used in COP’s Final Human Health Risk Assessment currently being reviewed by

KDHE and EPA.

Table 3 - Detections by Location

Qualifiers

Screening

Value1

COP Levee MW-105S 1,1-Dichloroethene 5.1 ug/L J 34

COP Levee MW-105S 1,2-Dibromo-3-chloropropane 21.5 ug/L J 0.00032

COP Levee MW-105S 1,3-Dichlorobenzene 8.8 ug/L J 0.43

COP Levee MW-105S 4-Chlorotoluene 6.5 ug/L J 260

COP Levee MW-105S 4-Isopropyltoluene (p-Cymene) 12.5 ug/L J 68

COP Levee MW-105S Bromobenzene 5.8 ug/L J 2

COP Levee MW-105S Bromochloromethane 5.9 ug/L J 4.8

COP Levee MW-105S Bromomethane 15.7 ug/L J 0.87

COP Levee MW-105S Carbon Disulfide 10.5 ug/L J 30

COP Levee MW-105S Ethylbenzene 286 ug/L 1.5

COP Levee MW-105S Hexachloro-1,3-butadiene 35.7 ug/L J 0.86

COP Levee MW-105S Methyl tert-butyl ether (MTBE) 7.3 ug/L J 12

COP Levee MW-105S Methylene chloride 68.8 ug/L 4.8

COP Levee MW-105S m-Xylene & p-Xylene 222 ug/L 140

COP Levee MW-105S Naphthalene 53.5 ug/L J 0.14

COP Levee MW-105S n-Butylbenzene 22.9 ug/L J 1.5

COP Levee MW-105S o-Xylene 15.9 ug/L J 140

COP Levee MW-105S tert-Butylbenzene 10 ug/L J 1.5

COP Levee MW-105S Toluene 221 ug/L 230

COP Levee MW-105S Trichloroethene 6.6 ug/L J 1.7

COP Levee MW-106S Carbon Disulfide 0.43 ug/L 30

COP Levee MW-106S Methyl tert-butyl ether (MTBE) 1 ug/L 12

COP Levee MW-106S Naphthalene 4.6 ug/L 0.14

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Qualifiers

Screening

Value1

COP Levee MW-106S Trichloroethene 0.22 ug/L 1.7

COP Levee MW-112S cis-1,2-Dichloroethene 0.12 ug/L J 37

COP Levee MW-302S Benzene 1.8 ug/L J 0.41

COP Levee MW-302S TPH-GRO 5400 ug/L J 500

COP Levee MW-303S 4-Methyl-2-pentanone (MIBK) 1.1 ug/L 200

Qualifiers

Screening

Value1

COP Levee MW-303S Ethylbenzene 1.3 ug/L J 1.5

COP Levee MW-304S 1,1,2,2-Tetrachloroethane 1.2 ug/L 0.067

COP Levee MW-304S Chloroform 2.3 ug/L 0.19

COP Levee MW-310 Chloroform 0.12 ug/L 0.19

COP Levee MW-313 4-Isopropyltoluene (p-Cymene) 0.25 ug/L 68

COP Levee MW-313 Benzene 181 ug/L 0.41

COP Levee MW-313 Ethylbenzene 0.74 ug/L 1.5

COP Levee MW-313 Isopropylbenzene 8.8 ug/L 68

Qualifiers

Screening

Value1

COP Levee MW-313 m-Xylene & p-Xylene 12.2 ug/L 140

COP Levee MW-313 n-Butylbenzene 0.16 ug/L 1.5

COP Levee MW-313 n-Propylbenzene 6.1 ug/L 1.5

COP Levee MW-313 o-Xylene 3.4 ug/L 140

COP Levee MW-313 tert-Butylbenzene 0.44 ug/L 1.5

COP Levee MW-313 Toluene 3.8 ug/L 230

COP Levee MW-313 Total Petroleum Hydrocarbons 250 ug/L J 720

COP Levee MW-313 TPH-GRO 1900 ug/L 500

2Results in Bold exceed the screening criteria

1Screening Levels are those used in COP’s Final Human Health Risk Assessment currently being reviewed by KDHE

and EPA.

Figures

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A c t i v e

I n a c t i v e

T e x w o o d

W i l l i a m sT a n kF a r m

MW-4 MW-3

MW-87MW-86

MW-82 MW-80MW-79

MW-77MW-76

MW-75(DRY)

MW-66MW-64MW-63

MW-61MW-59MW-57MW-56

MW-55MW-54

MW-49MW-48

MW-43MW-42 MW-39MW-38

MW-37MW-35

MW-25MW-24

MW-22MW-21

MW-19 MW-18MW-16

MW-14 MW-13

PZ-366PZ-365PZ-364

MW-314 (718.15)

MW-313 (718.83)

PZ-444

PZ-434PZ-433

PZ-427PZ-426

PZ-423PZ-422

PZ-418

PZ-417

PZ-416

PZ-403PZ-402PZ-401

PZ-363

PZ-362

PZ-361

PZ-360PZ-359

PZ-358

PZ-357

PZ-356

PZ-355

PZ-354

PZ-353PZ-352

PZ-351PZ-350

MW-48A

MW-36C

MW-36B

MW-36A

MW-312

MW-311 (719.55)

MW-310 (719.77)

MW-309 (720.10)

MW-308 (720.68)

MW-307 (721.02)

MW-306 (721.34)

MW-305 (721.25)MW-22A

MW-20A

MW-304S (720.42)MW-304D

MW-303S (720.74)MW-303D

MW-302S (721.88)MW-302D

MW-301S (721.91)MW-301D

MW-113S(DESTROYED)

MW-112S (721.61)MW-112D

MW-111S (720.68)MW-111D

MW-110SMW-110D

MW-109SMW-109D

MW-108SMW-108D

MW-107S (720.19)MW-107D

MW-106S (721.59)MW-106D

MW-105S (722.11)MW-105D

MW-104D

MW-103SMW-103D

MW-102D

MW-101D

MW-100SMW-100D

PZ-443PZ-442

PZ-441

PZ-432PZ-431

PZ-425PZ-424

PZ-421

PZ-415PZ-414

PZ-413PZ-412PZ-411 PZ-410

PZ-400

MW-38CMW-208

Legend&< Well Location

Active AreaInactive AreaTexwood AreaWilliams Tank Farm Area

1 inch = 750 feet

0 750375Feet

Missouri

8300 College Blvd. Suite 200Overland Park, KS 66210

Levee Well Sampling NetworkDRAWN BY

JLVCHECKED BY

CRYAPPROVED BY

DCCPROJECT No.

16530726DATE

MARCH 2011FIGURE NO

TITLE:

Former Phillips Refinery & KC Terminal

CLIENT: ConocoPhillips RM&R

illips\L

ling N

etwork

MW-106SMW-314

Site Side MWRiver Side MW

(722.11) GW Elev. (feet MSL)

Attachments

Attachement1 Levee Well Sampling Plan

I:\16530599 COP 2010 Semi-annual GW Monitoring\Levee Sampling Plan\Letter Work Plan.doc

URS Corporation8300 College Blvd., Suite 200Overland Park, KS 66210Tel: 913.344.1000Fax: 913.344.1011

June 7, 2010

Amber Whisnant - Environmental Scientist

Air and Waste Management Division

RCRA Corrective Action and Permits Branch

U.S. Environmental Protection Agency, Region 7

901 North 5th

Street

Kansas City, KS 66101

Draft Final Letter Work Plan - Levee Well Sampling Plan

ConocoPhillips - Former Phillips Refinery and KC Terminal Site

Kansas City, Kansas

Dear Amber:

On behalf of ConocoPhillips (COP), URS submits subject work plan to sample monitoring wells

(see Attachment 1 for map of wells) on either side of the Fairfax Drainage District Missouri

River levee during anticipated low flow conditions in the Missouri River in December

2010/January 2011. This work was proposed during our May 12, 2010 meeting with the

Environmental Protection Agency (EPA) and the Kansas Department of Health and Environment

(KDHE).

Background: Historically, contaminant levels in monitoring wells on the west side (Site Side) of

the levee have been above reporting limits and in some cases in excess of screening levels.

Conversely, results from River Side (east side of levee) monitoring wells are generally below

reporting limits. For example, in October 2009, 22.5 mg/L TPH GRO was reported for Site Side

MW-105S. During the same event, TPH GRO results for three likely downgradient River Side

monitoring wells (MW-306, MW-113S, and MW-307) were below the 0.5 mg/L TPH GRO

reporting limit. COP has stated in the past that the frequent influx of oxygenated river water plus

dilution during periods of flow reversal, when the river elevation is higher than the groundwater

elevation, may explain this phenomenon.

Levee Well Sampling Plan Objective: The plan objective is to collect data to compare

groundwater contaminant levels between Site Side and River Side monitoring wells during low

flow conditions in the Missouri River. Following an extended period at low flow, the gradient,

hence flow direction, would have been toward the river for a sufficient period of time to assume

that the impact of flow reversals was minimal, and that contaminant levels would be at their

highest annual concentration during this period of net groundwater discharge to the river.

Per Attachment 2 showing the last 10 years of gage heights for the Missouri River in this area, it

is clear that low flow conditions occur in winter (December - February) as they have for the last

10 years. URS monitors this information using on-line resources found at Advanced Hydrologic

Prediction Service: Kansas City/Pleasant Hill: Missouri River at Kansas City. For example, on

June 4, 2010, the gage reading was 20.11-feet at 10:30am (Attachment 3). This reading added to

the gage elevation of 706.4-feet above mean sea level (MSL) = 726.51-feet MSL. Static water

Amber Whisnant

June 7, 2010

levels for River Side levee wells in April 2010 averaged 729-feet. Also, during low flow, we

anticipate groundwater being within the screened intervals of most monitoring wells listed

below. (See Attachment 4.)

Sampling Plan: Sampling procedures follow those described in the Final Semi-annual

Groundwater Monitoring Plan (GWMP) dated April 2010 except as noted below.

1. Per Attachment 2, the sampling event will most likely be conducted in January or

February 2011. COP will provide at least one week’s notice to EPA and KDHE before

field work commences.

2. The GWMP is site-wide and includes 49 monitoring wells. This plan only covers 20

monitoring wells as listed below. Locations are shown on Attachment 1.

Site Side MWs River Side MWs

112S 305

301S 306

105S 113S

302S 307

106S 308

303S 309

313 314

111S 310

75 311

3. Analysis will include VOCs, TPH GRO and TPH DRO, but not RCRA Metals plus iron.

4. A Draft Final Technical Memorandum will be prepared for EPA and KDHE review

following receipt and validation of analytical data. Results will also be included in the

2011 Annual Groundwater Monitoring Report.

Attachment 4 includes monitoring well data such as ground surface elevation, screened interval,

October 2009 and April 2010 groundwater elevations plus April 2010 gasoline range organic

(GRO) results. In October 2009, 12 out of the 20 levee wells had submerged screens (i.e. the

static water level was above the top of the screen). In April 2010 when groundwater was

significantly higher, 15 out of the 20 wells had submerged screens.

Amber Whisnant

June 7, 2010

Questions should be directed to the undersigned at (913) 344-1132 and

pete_stover@urscorp.com.

Regards,

URS Corporation

Peter M. Stover, PE

Principal Engineer Attachment 1: Levee Well Sampling Plan, Figure 1

Attachment 2: Missouri River Gage Height: 10 Years - January 2000 to June 2010

Attachment 3: Missouri River Gauge KCDM7 - June 4, 2010

Attachment 4: Levee Well Data

cc: Jason C. Voegeli - ConocoPhillips RM&R, Bartlesville, OK

John Cook - KDHE, Topeka, KS

Attachments Attachment 1: Levee Well Sampling Plan, Figure 1

Attachment 2: Missouri River Gage Height:

10 Years - January 2000 to June 2010

Attachment 3: Missouri River Gauge KCDM7 -

June 4, 2010

Attachment 4: Levee Well Data

&< &< &< &< &<

&<&<&<

&<&< &<

&< &< &< &<

&<&< &<

&<&<&<&<

&<&<&<&<&<&<

&<&<&<&<&<&<&<

&<&<&<&<

A c t i v e

I n a c t i v e

T e x w o o d

W i l l i a m sT a n kF a r m

MW-4 MW-3

MW-87MW-86

MW-82 MW-80MW-79

MW-77MW-76

MW-75MW-70

MW-66MW-64MW-63

MW-61MW-59MW-57MW-56

MW-55MW-54

MW-49MW-48

MW-43MW-42 MW-39MW-38

MW-37MW-35

MW-25MW-24

MW-22MW-21

MW-19 MW-18MW-16

MW-14 MW-13

PZ-366PZ-365PZ-364

MW-314

MW-313

PZ-444

PZ-434PZ-433

PZ-427PZ-426

PZ-423PZ-422

PZ-418

PZ-417

PZ-416

PZ-403PZ-402PZ-401

PZ-363

PZ-362

PZ-361

PZ-360PZ-359

PZ-358

PZ-357

PZ-356

PZ-355

PZ-354

PZ-353PZ-352

PZ-351PZ-350

MW-48A

MW-36C

MW-36B

MW-36A

MW-312

MW-311

MW-310

MW-309

MW-308

MW-307

MW-306

MW-305MW-22A

MW-20A

MW-304SMW-304D

MW-303SMW-303D

MW-302SMW-302D

MW-301SMW-301D

MW-113S

MW-112SMW-112D

MW-111SMW-111D

MW-110SMW-110D

MW-109SMW-109D

MW-108SMW-108D

MW-107SMW-107D

MW-106SMW-106D

MW-105SMW-105D

MW-104D

MW-103SMW-103D

MW-102D

MW-101D

MW-100SMW-100D

PZ-443PZ-442

PZ-441

PZ-432PZ-431

PZ-425PZ-424

PZ-421

PZ-415PZ-414

PZ-413PZ-412PZ-411 PZ-410

PZ-400

MW-38CMW-208

Legend&< Well Location

Active AreaInactive AreaTexwood AreaWilliams Tank Farm Area

1 inch = 750 feet

0 750375Feet

Missouri

8300 College Blvd. Suite 200Overland Park, KS 66210

Attachment 1 Levee Well Sampling PlanDRAWN BY

KTSCHECKED BY

MMLAPPROVED BY

PMSPROJECT No.

16530385DATE

JUNE 2010FIGURE NO

TITLE:

Former Phillips Refinery & KC Terminal

CLIENT: ConocoPhillips RM&Rµ

illips\A

lan .m

MW-106SMW-314

Site Side MWRiver Side MW

Attachment 2

Missouri River Gage Height: 10 Years - January 2000 to June 2010

Jan-00 Jan-01 Jan-02 Jan-03 Jan-04 Jan-05 Jan-06 Jan-07 Jan-08 Jan-09 Jan-10

(feet)

Low Water Record: 3.17 feet on January 19, 2007

Flood Stage = 32 feet

Source

Title: USGS Surface-Water Daily Data for the Nation

URL: http://waterdata.usgs.gov/nwis/dv

Recent Historic Crest: 35.47 feet on May 8, 2007

Attachment 3

Attachment 4

Levee Well Data

Ground Surface

Elevation (MSL1)

October 2009

SWL2 (MSL)

April 2010

SWL (MSL)

Top of Screen

(ft bgs3)

Top of Screen

SWL-Feet Below

Screen Oct 2009

SWL-Feet Below

Screen4 April 2010

Bottom of

Screen (ft bgs)

Total Depth

April 2010 GRO

(mg/L)5

1 MW-112S 742.78 722.26 729.21 22 720.78 -1.48 -8.43 32 34.78 ND(0.500)

2 MW-305 745.06 722.22 729.53 25 720.06 -2.16 -9.47 35 34.26 ND(0.500)

3 MW-301S 745.40 722.76 728.83 15 730.40 7.64 1.57 35 36.63 0.078J

4 MW-306 743.93 722.16 729.38 25 718.93 -3.23 -10.45 35 34.44 ND(0.500)

5 MW-105S 742.68 722.82 728.66 22 720.68 -2.14 -7.98 32 35.12 Sheen

6 MW-113S 742.28 721.83 729.34 22 720.28 -1.55 -9.06 32 30.66 ND(0.500)

7 MW-302S 744.90 722.61 728.72 15 729.90 7.29 1.18 35 37.13 0.82

8 MW-307 743.72 721.88 729.32 24.9 718.82 -3.06 -10.50 34.9 34.56 ND(0.500)

9 MW-106S 746.08 722.39 728.90 22 724.08 1.69 -4.82 32 35.47 4.3

10 MW-308 745.20 721.66 729.34 24.9 720.30 -1.36 -9.04 34.9 34.64 ND(0.500)

11 MW-303S 745.70 721.71 729.22 15 730.70 8.99 1.48 35 37.37 0.5

12 MW-313 743.50 719.81 727.53 25 718.50 -1.31 -9.03 35 37.81 Not Sampled

13 MW-309 742.84 721.07 729.61 24.9 717.94 -3.13 -11.67 34.9 34.71 ND(0.500)

14 MW-111S 744.38 721.70 729.48 22 722.38 0.68 -7.10 32 34.00 ND(0.500)

15 MW-314 740.81 719.16 727.86 25 715.81 -3.35 -12.05 35 34.11 ND(0.500)

16 MW-75 742.62 721.84 728.97 5 737.62 15.78 8.65 25 29.04 Not Sampled

17 MW-304S 746.80 721.46 729.32 15 731.80 10.34 2.48 35 37.63 3.9

18 MW-310 742.91 720.79 729.46 24.9 718.01 -2.78 -11.45 34.9 34.35 0.11J

19 MW-107S 743.48 721.29 729.37 22 721.48 0.19 -7.89 32 34.10 ND(0.500)

20 MW-311 743.02 720.60 729.44 25 718.02 -2.58 -11.42 35 34.58 ND(0.500)1MSL = feet above mean sea level2SWL = static water level3bgs = below ground surface4Negative result means SWL is above screen5Preliminary data (i.e. validation incomplete)

\\s076-2k-004\projects\16530599 COP 2010 Semi-annual GW Monitoring\Levee Sampling Plan\Attachment 3.xls Attachment 4 Page 1 of 1

Attachement2 Pace Analytical Laboratory Reports

Attachement3 Field Data Sheets

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